Mounted a Yaesu FT-7900R in the '12 JKUR - Jeep Wrangler Forum

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Old 05-28-2012, 03:41 PM   #1
Join Date: Jan 2012
Posts: 84
Mounted a Yaesu FT-7900R in the '12 JKUR

With the limited space in the Jeep, We decided to move the Yaesu FT-7900R and Larsen NMO 2/70 antenna from the Power Wagon to the Rubicon. The detachable faceplate allowed us to find room for the faceplate and microphone between the seats on the sound bar. The radio itself is under the passenger's seat. All the wiring was all run under carpet or in the B-pillar trim, and I used the factory wiring loom from the body to the tailgate for the coax. Power was brought thru the firewall on the driver side firewall, and the loom was secured via various locations with wire ties. It was routed under the console to the floor at the passengers side seat. Jeep provides a rubber grommet thru the tailgate on the right side of the spare tire mount for the coax. Very handy! I bent a 90 deg bracket from 1.50" x 0.125 mild steel, and used Duplicolor bed liner from a rattle can to keep it from rusting. Obviously the antenna location is not ideal, but it is well protected, and clears the garage door by an inch. SWR is 2.5, but the reports I've gotten so far are good. I had no trouble reaching Prescott on simplex from inside the garage, roughly 15 miles. The repeater in Flagstaff was clear, but my transmissions were reported a bit scratchy. Again this was from inside the garage, so it should be better outside. I was please with how clean the install came out, but it sure took a long time. It was a full 8 hours with a short break to clean up and bandage a nice little grinder wound on my right index finger. The old Makita 4" with no guard bit me pretty good while shaping the mount. It removed a strip about 5/16 wide x 1.25 long about an 1/8 deep. After that it really took time to get stuff done...
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CactusRed is offline   Quote
Old 05-28-2012, 03:55 PM   #2
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Join Date: May 2011
Posts: 119
Nice work! Looks like a pretty clean installation. Are you planning to tune the antenna for a better SWR? I like to know how that works out for you.

I just completed mounting a Larsen NMO 2/70 on mine in pretty much the same location. I used a section of 1" aluminum angle for the the mount and ran the coax through the tail gate as you described. Now it's time to purchase a new transceiver. Thinking of the Icom ID-880H with the head mounted on the dash and the unit under the drivers seat.

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Old 05-28-2012, 05:13 PM   #3
Join Date: Jan 2012
Posts: 84
The Larsen 2/70 isn't tunable - it's a coil/whip that is factory set. I'm not concerned about the SWR as it is. We'll using the radio for trail comms on low power 99% of the time.
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